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Structure of the Atom — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceStructure of the Atom1 Mark
MCQ
Which of the following atom has a valency of three:
  • A
    Magnesium
  • B
    Fluorine
  • C
    Aluminium
  • D
    Carbon
✓

Answer

  1. Aluminium

Explanation:

 

Aluminium with three valence electrons has a valency = 3

Fluorine has seven valence electrons and has a valency = 1

Magnesium has two valence electrons and has a valency = 2

Carbon has four valence electrons and has a valency = 4

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